how can I get specific image of the biggest size ??

in that piece of code that I uses object recognition that is scale images according to the matched features I try to get specific image from here of the biggest size ?

    for i = 1:numel(imageCollection) % Scale each image
        newSize = round( counts(i) / max(counts) * imageScalingFactor) * 2 ...
        + minImageSize; % Compute a new size for display
        scaledImage = imresize(imageCollection(i).thumbnail,[newSize,newSize]);
        imageCollection(i).imageHistogramView = padarray(scaledImage,...
            [(thumbnailSize-newSize)/2,(thumbnailSize-newSize)/2],...
            whiteBackground);
    end